Lockup control device

Details Lockup control device Lockup control device

2006-08-04

2009-08-25

Pang, Roger (Department: 3655)

Interrelated power delivery controls, including engine control

Clutch control

With fluid drive

C477S171000

Reexamination Certificate

active

07578769

ABSTRACT:
Excellent fuel consumption and drivability are achieved by properly controlling the lockup-canceling timing in a vehicle with an automatic transmission equipped with a torque converter having lockup features. Conventionally, the lockup got cancelled when it was determined that the vehicle speed was lower than a first lockup-canceling vehicle speed used when the accelerator was OFF at the same time the brakes were OFF. Herein, however a delay timer is activated after the accelerator is released (OFF) to set a second lockup-canceling vehicle speed, which is slower than the first lockup-canceling vehicle speed and which is used when the brake is activated (ON). As a result, the lockup will not be cancelled until the vehicle speed reaches the second vehicle speed, and the lockup period can be ensured for a longer period of time.

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patent: 11-159608 (1999-06-01), None
patent: 2001-330127 (2001-11-01), None

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